Malicious PDF — malware analysis report

Static analysis result for SHA-256 7309d9bd48759074…

MALICIOUS

PDF

41.3 KB Created: 2021-05-11 21:04:40 +07:00 Authoring application: wkhtmltopdf 0.12.6 (via Qt 4.8.7) First seen: 2021-10-07
MD5: bc40a13dc74a3d0cdec0fee54bcf1035 SHA-1: 4f93e8508bdbe4a5b2e2c03a8fab0106314037cc SHA-256: 7309d9bd48759074e7de6934d042d2ea5bd39000e90b3cbcd1bcf28e7a3efdfe
82 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

The PDF contains a prominent link to a 'free generator / game hack' lure, which is a common social engineering tactic to trick users into downloading malware or visiting malicious sites. The ML classifier also strongly indicated maliciousness. Although no scripts were directly extracted, the PDF structure itself contains embedded URIs designed to redirect the user to potentially harmful content.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9971

Heuristics 4

  • PDF links to a 'free generator / game hack' redirector high PDF_GAME_HACK_REDIRECT_LURE
    PDF's clickable action targets a redirector of the form /app/<id>/<slug>-game-hack — the landing-page shape of a large SEO 'free spins / generator / game hack' lure family that funnels victims through rotating disposable hosts to a malware/scam payload. The multi-link variants also trip ML/link-farm rules; this catches the single-link variants that otherwise score clean.
  • Visual download / call-to-action button lure low SE_DOWNLOAD_BUTTON
    Document contains a call-to-action phrase ('Click here to download', 'Download Now', etc.) — low-signal unless other findings point to a malicious workflow
  • External URI info PDF_URI
    PDF contains an external URL action
  • Embedded URL info EMBEDDED_URL
    One or more URLs were extracted from the document. The URL itself is not a detection — see the per-URL labels for which channel (macro, JS, link annotation, document body, ...) reached each URL.
    URL https://netcdn.xyz/app/406889139/free-spins-on-coin-master-game-hack PDF link annotation
    • http://kulturhusbabberich.nl/images/roblox-land-free-robux_GM431946152.pdfIn PDF document text
    • http://kulturhusbabberich.nl/images/coin-master-update-2021_GM406889139.pdfIn PDF document text
    • http://kulturhusbabberich.nl/images/free-robux-no-human-verification-or-survey-2021_GM431946152.pdfIn PDF document text
    • http://kulturhusbabberich.nl/images/roblox-pics_GM431946152.pdfIn PDF document text
    • http://kulturhusbabberich.nl/images/arsenal-hacks-roblox_GM431946152.pdfIn PDF document text
    • http://kulturhusbabberich.nl/images/how-to-get-robux-for-free-2021_GM431946152.pdfIn PDF document text
    • http://kulturhusbabberich.nl/images/roblox-lovenet_GM431946152.pdfIn PDF document text
    • http://kulturhusbabberich.nl/images/coin-master-free-spins-daily-2021_GM406889139.pdfIn PDF document text
    • http://kulturhusbabberich.nl/images/minecraft-hax-download-no-virus_GM479516143.pdfIn PDF document text
    • http://kulturhusbabberich.nl/images/coin-master-free-spins-2021_GM406889139.pdfIn PDF document text
    • http://kulturhusbabberich.nl/images/free-coin-master-credit_GM406889139.pdfIn PDF document text
    • http://kulturhusbabberich.nl/images/coin-master-hack-apk-download_GM406889139.pdfIn PDF document text
    • http://kulturhusbabberich.nl/images/robux-hack-me_GM431946152.pdfIn PDF document text
    • http://kulturhusbabberich.nl/images/coin-master-mod-apk-latest-version-free-download_GM406889139.pdfIn PDF document text
    • http://kulturhusbabberich.nl/images/minecraft-svg-free_GM479516143.pdfIn PDF document text
    • http://kulturhusbabberich.nl/images/free-minecraft-capes-no-mods_GM479516143.pdfIn PDF document text
    • http://kulturhusbabberich.nl/images/coin-master-free-spins-for-today_GM406889139.pdfIn PDF document text
    • http://kulturhusbabberich.nl/images/how-to-get-free-pets-in-adopt-me-roblox_GM431946152.pdfIn PDF document text
    • http://kulturhusbabberich.nl/images/free-spins-coin-master-2021-hack_GM406889139.pdfIn PDF document text
    • http://kulturhusbabberich.nl/images/easy-ways-to-get-free-robux_GM431946152.pdfIn PDF document text
    • http://en.wikipedia.org/wiki/MIT_LicenseIn PDF document text

Extracted artifacts 2

Files carved from inside the sample during analysis.

FilenameKindSourceSize
stream_003_off0000471c.bin decompressed-pdf-stream PDF FlateDecoded stream at offset 0x471C 24848 bytes
SHA-256: 5df9b2729c5dc8eeee69064c7dfa7448b7fb522e345a7516675a5cd4ae985088
font_01_sfnt_off0000805a.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x805A 17884 bytes
SHA-256: addbd5428a422ca7211e94293fed3a4f98c85d5f6337328d4d3623e90d90c649

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